package com.zhiqian.community.entity;


/**
 * 封装分页相关的信息
 */
public class Page {
    //当前的页码
    private int current=1;
    //一页显示的数量
    private int limit=10;
    //数据的总数，用于计算总的页数
    private int rows;
    //查询路径
    private String path;

    public int getCurrent() {
        return current;
    }

    public void setCurrent(int current) {
        if(current>=1){
            this.current = current;
        }
    }

    public int getLimit() {
        return limit;
    }

    public void setLimit(int limit) {
        if (limit>=1&&limit<=100) {
            this.limit = limit;
        }
    }

    public int getRows() {
        return rows;
    }

    public void setRows(int rows) {
        if (rows>=0) {
            this.rows = rows;
        }
    }

    public String getPath() {
        return path;
    }

    public void setPath(String path) {
        this.path = path;
    }

    /**
     * 获取当前页的起始行
     * @return
     */
    public int getOffset(){
        return (current-1)*limit;
    }

    /**
     * 获取总页数
     * @return
     */
    public int getTotal(){
        return rows%limit==0?rows/limit:rows/limit+1;
    }

    /**
     * 获取分页组件的起始页
     * @return
     */
    public int getFrom(){
        int from=current-2;
        return from<1?1:from;
    }

    /**
     * 获取分页组件的截至页
     * @return
     */
    public int getTo(){
        int to=current+2;
        int total=getTotal();
        return to>total?total:to;
    }
}
